If a town has been removed during the game, saving crashes with weighted_vector_tpl<T>::index_of() - not contained.
I cannot reproduce this error, but I have found and fixed an error relating to deleting cities which might be connected to this. Are you able to re-test?
It still occurs. Maybe the town needs to be connected with a stop. Otherwise try with the saved game form my last report about way upgrades.
I am still having trouble reproducing this. Which specific town did you delete? I deleted Kettering without difficulty when saving afterwards.
I get it when deleting Notting Hill.
Do you get it when you delete Kettering?
Thank you for that. I think that I have now fixed this: would you be able to re-test?